/** 
  * Current Account Balances: Graphical Display Applet
  * @author Robert J Morton UK-YE572246C
  * @version 12 July 2000, 23 April 2012
  * @copyright July 2000 Robert J Morton (all rights reserved) */

//  THE MAXIMUM, MINIMUM, AVERAGE AND SWING DISPLAY PANEL

import java.awt.*;     // for graphics operations (GUI)
import javax.swing.*;  // swing GUI widgets library


public class maxmin extends JPanel {

  // larger font for displaying the statistics figures
  private Font font = new Font("Sans", Font.BOLD,14);

  // main background colour for this panel
  private static final Color bg = new Color(238,238,238);

  private String 
    Max = "",  // string to hold the maximum balance over the year
    Min = "",  // string to hold the minimum balance over the year
    Av = "",   // string to hold the average balance over the year
    Sw = "";   // string to hold the swing in the balance over the year


  void atualizar(int max, int min, int a, int w) {

    /* Convert the maximum, minimum & average balances
    and the maximum to minimum swing to strings. */

    Max = money(max);
    Min = money(min);
    Av = money((int)((double)a / (double)w));
    Sw = money(max - min);

    repaint();  // redisplay the statistics figures
  }


  // MONEY DISPLAY FORMATTER (takes integral pence)
  String money(int x) {
    double X = (double)x;      // Convert integral pence
    X /= 100;                  //into decimal pounds Sterling.
    String s = "" + X;         // form it into a string
    int c = '.';               // decimal point character
    int i = s.lastIndexOf(c);  // find position of decimal point in string

    if(i == -1)    // if no decimal point is found,
      s += ".00";  // tack on a ".00" pence.
    else {         // Otherwise there is a decimal point, so

      int e = s.length() - i;  /* compute how far the decimal point
                                  is from the end of the string. */

      if(e == 1)       // If it is at the end of the string,
        s += "00";     // add two zeros after it;
      else if(e == 2)  // if it is the last-but-one character,
        s += "0";      // add only one zero after it;
    }                  // otherwise don't add any zeros.
    return s;          // return the formatted string
  }


  public void paint(Graphics g) {
    // clear the average balance panel to background colour
    g.setColor(bg); g.fillRect(0,0,350,50);
    // Display the statistical data in a large black font.
    g.setColor(Color.black); g.setFont(font);
    g.drawString("Max",0,22); g.drawString("£" + Max,40,22);
    g.drawString("Min",0,42); g.drawString("£" + Min,40,42);
    g.drawString("Average",146,22); g.drawString("£" + Av,220,22);
    g.drawString("Swing",146,42); g.drawString("£" + Sw,220,42);
  }
}